#$%^&*AU2017254832B220181122.pdf#####DELIVERY OF MEDICAL DEVICES ABSTRACT A stent delivery system (100) can include an elongate core member (160) sized for insertion into a blood vessel (102). The core member (160) can be configured to advance a stent (200) toward a treatment location in the blood vessel (102). The core member (160) can include a longitudinally extending tube (170) having a helical cut extending along the tube (170). The helical cut can have an axial length of at least 50 cm and be continuous along the axial length.